Here’s a riddle for you: A plane flew for five days and nights, staying airborne for 118 hours. But it didn’t use a single drop of fuel. How? Bertrand Piccard explains.
因为它靠太阳能驱动。太阳能飞机”阳光动力2号”搭载了约17,000块太阳能电池板，白天飞升至28,000英尺的高空，收集足够的太阳能为四台电动发动机所连接的电池充电。这些电池随后为飞机提供接下来12小时黑暗中的飞行动力。日出时，电池开始重新充电——如此循环往复。这架单座飞机是探险家贝尔特朗·皮卡尔（TED演讲：我的太阳能冒险之旅）的梦想，他设计这架飞机旨在展示无污染旅行的潜力与可能性。2015年7月1日，这架飞机从日本飞往夏威夷，历时五天、飞行5,100英里，创下了史上最长飞行时间的世界纪录。目前”阳光动力2号”正在停飞维修（详情见下文），皮卡尔从夏威夷接受了电话采访，分享了他这一宏大构想背后的故事。
这次太阳能飞行追求的不是速度或飞行时长，而是要证明旅行还有另一种可能。太阳能飞机本身并不是新鲜事物；第一批实验性飞行器早在20世纪70年代便已试飞。但皮卡尔
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